Improvement in balanced rock-valves



N. FETERS, PHOTO LITHOGRAPH JOHN 0. KING, on NEW YORK, NQY,

NIT-ED STATES ASSIGNOR TO HIMSELF, GEOBGEM.

WOODWARD, AND GEORGE A. BLOOD, OF SAME PLACE.

IMPROVEMENT IN BALANCED ROCK-VALVES.

Specification forming part of Letters Patent No. 107,505, datedSeptember 20, 1870.

.To aZZ whom it may concern:

Be it known that I, JOHN C. KING, of the city of New York, in the countyand State of New York, have invented a new and Improved BalancedRock-Valve; and I do hereby declare that the following is a full, clear,and exact This invention relates to a new rock-valve for pumps,steam-chests, &c., and has for its object to so construct the same thatit will be fully balanced.

The valve A, which is made cylindrical or slightly conical, consists oftwo heads, a a, which are connected by two longitudinal pieces, I) andc. The piece 1) forms the bridge for connecting the exhaust-port dalternately with the ports 6 e. The piece 0 is a bracing-strip above thebridge. The valve is hung upon a shaft, B, within the steam-chest G,into an open cylindrical shell, D, formed therein, the said shell havingtwo openings, f f, in the sides, through which steam is admitted to thevalve. The steam, it will be seen, is in contactwith the upper surfaceof the bridge I) and'with the lower side of the connecting-plate 0, andserves, therefore, to balance the valve and to keep it properlysuspended. The valve will consequently operate without friction.

' Having thus described my invention, I claim as new and desire tosecure by Letters Patent The balanced rock-valve consisting of the headsa a, bridge 12, and plate 0, as herein shown and described.

JOHN (3. KING. Witnesses:'

GEO. W. MABEE, ALEX. F. ROBERTS.

substantially

